Greetings,

I just got a '93 300E 2.8 for a song. It's in great shape (just a couple of minor fixes) except for the climate control. I get no response when pushing any of the buttons or turning the temp control. The blower come on and the compressor doesn't kick in.
1. How do I begin troubleshooting the system?
2. Where can I find a FSM?
3. Barring that, is there any service manual available?

This is my first Mercedes and I could use any help at all.

Bob